-stable review patch. If anyone has any objections, please let us know.

------------------Suspending with the cx88xx module loaded causes the system to lock upbecause the cx88_audio_thread kthread was missing a try_to_freeze()call, which caused it to go into a tight loop and result in softlockupwhen suspending. Fix that.(cherry picked from commit a96afb3e9428f2e7463344f12dbc85faf08e2e09)